I want to draw a table like the attached with LaTeX. I'm using the table and tabular environmnet. My problem is how I can represent the line which goes from the begining to the end of the table at the bottom of the figure. My idea is draw a line with \multicolumn{6}{|c|}{...} but I can't obtain it, because the height is too long.

Any idea? I hope I explain my problem plainly.

If I use the solution that @egreg says I have another problem. I need colour some cells of another tables, so I use the code \usepackage[table]{xcolor} but it does the line shorter. The is somethin like this:

Thank you, that is the perfect solution, thank you very much!!
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bra_racingJan 17 '13 at 12:41

Now I've another problem. In my preamble I've the sentence `\usepackage[table,hyperref]{xcolor}´ for put colours in cells of other tables. It causes that line is shorter than I expect. There are another alternative for change the colours of the cells??
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bra_racingJan 17 '13 at 15:52